<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>04_JS运算符</title>
</head>
<body>
<script>
    console.log(6/3);//2
    console.log(3/2);//1.5
    console.log(3>10);//false
    console.log(3>'10');//false Number('10')=>10 3>10?
    console.log('3'>10);//false
    console.log('3'>'10');////51>49=true
    console.log('奇'>'宇');//都是字符串比较的是字符的编码值
    console.log('奇'.charCodeAt());//查看字符的编码值，默认值为0，查看第一个字符的编码值
    console.log('宇'.charCodeAt());
    console.log('3'.charCodeAt(1));//第二个位置，3的编码为51
    console.log('10000'.charCodeAt(0))//第一个位置，1的编码为49

    let a=1;
    let b=true;
    //松散比较运算符会比较左右两边的值，严格比较运算符会先比较类型，类型相同再比较值
    console.log(a==b);//1==Number(true)值都是1 结果为true
    console.log(a===b);//number≠boolean=>false
    //三元运算符
    //1？2：3
    let c=0;
    console.log(c==0? 'YES':'NO');//'Yes'
    console.log(c=0? 'YES':'NO');//'NO'
</script>

</body>
</html>